Scientists identified more than 600 viruses in samples taken from bathrooms in the United States. The viruses infect bacteria — not people — and scientists say they may provide more benefits than causes for concern.

A recent study has found that common bathroom fixtures like showerheads and toothbrushes are teeming with bacteriophages, viruses that attack bacteria, not humans. This discovery offers promising avenues for treating resistant bacterial infections and underscores the safety of household microbes.